<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * manipulation of table data like inserting, replacing and updating
 *
 * usally called as form action from tbl_change.php to insert or update table rows
 *
 * @version $Id: tbl_replace.php 11281 2008-05-18 15:53:27Z lem9 $
 *
 * @todo 'edit_next' tends to not work as expected if used ... at least there is no order by
 *	   it needs the original query and the row number and than replace the LIMIT clause
 * @uses	PMA_checkParameters()
 * @uses	PMA_DBI_select_db()
 * @uses	PMA_DBI_query()
 * @uses	PMA_DBI_fetch_row()
 * @uses	PMA_DBI_get_fields_meta()
 * @uses	PMA_DBI_free_result()
 * @uses	PMA_DBI_try_query()
 * @uses	PMA_DBI_getError()
 * @uses	PMA_DBI_affected_rows()
 * @uses	PMA_DBI_insert_id()
 * @uses	PMA_backquote()
 * @uses	PMA_getUniqueCondition()
 * @uses	PMA_sqlAddslashes()
 * @uses	PMA_securePath()
 * @uses	PMA_sendHeaderLocation()
 * @uses	str_replace()
 * @uses	urlencode()
 * @uses	count()
 * @uses	file_exists()
 * @uses	strlen()
 * @uses	str_replace()
 * @uses	preg_replace()
 * @uses	is_array()
 * @uses	$GLOBALS['db']
 * @uses	$GLOBALS['table']
 * @uses	$GLOBALS['goto']
 * @uses	$GLOBALS['sql_query']
 */

/**
 * do not import request variable into global scope
 *
 * cannot be used as long as it could happen that the $goto file that is included
 * at the end of this script is not updated to work without imported request variables
 *
 * @todo uncomment this if all possible included files to rely on import request variables
if (! defined('PMA_NO_VARIABLES_IMPORT')) {
	define('PMA_NO_VARIABLES_IMPORT', true);
}
 */
/**
 * Gets some core libraries
 */
require_once './libraries/common.inc.php';

// Check parameters
PMA_checkParameters(array('db', 'table', 'goto'));

PMA_DBI_select_db($GLOBALS['db']);

/**
 * Initializes some variables
 */
$goto_include = false;

if (isset($_REQUEST['insert_rows']) && is_numeric($_REQUEST['insert_rows']) && $_REQUEST['insert_rows'] != $cfg['InsertRows']) {
	$cfg['InsertRows'] = $_REQUEST['insert_rows'];
	$js_to_run = 'tbl_change.js';
	require_once './libraries/header.inc.php';
	require './tbl_change.php';
	exit;
}

if (isset($_REQUEST['after_insert'])
 && in_array($_REQUEST['after_insert'], array('new_insert', 'same_insert', 'edit_next'))) {
	$url_params['after_insert'] = $_REQUEST['after_insert'];
	//$GLOBALS['goto'] = 'tbl_change.php';
	$goto_include = 'tbl_change.php';

	if (isset($_REQUEST['primary_key'])) {
		if ($_REQUEST['after_insert'] == 'same_insert') {
			foreach ($_REQUEST['primary_key'] as $pk) {
				$url_params['primary_key'][] = $pk;
			}
		} elseif ($_REQUEST['after_insert'] == 'edit_next') {
			foreach ($_REQUEST['primary_key'] as $pk) {
				$local_query	= 'SELECT * FROM ' . PMA_backquote($GLOBALS['db']) . '.' . PMA_backquote($GLOBALS['table'])
								. ' WHERE ' . str_replace('` =', '` >', $pk)
								. ' LIMIT 1;';
				$res			= PMA_DBI_query($local_query);
				$row			= PMA_DBI_fetch_row($res);
				$meta		   = PMA_DBI_get_fields_meta($res);
				// must find a unique condition based on unique key,
				// not a combination of all fields
				if ($tmp = PMA_getUniqueCondition($res, count($meta), $meta, $row, true)) {
					$_SESSION['edit_next'] = $tmp;
				}
				unset($tmp);
			}
		}
	}
} elseif (! empty($GLOBALS['goto'])) {
	if (! preg_match('@^[a-z_]+\.php$@', $GLOBALS['goto'])) {
		// this should NOT happen
		//$GLOBALS['goto'] = false;
		$goto_include = false;
	} else {
		$goto_include = $GLOBALS['goto'];
	}
	if ($GLOBALS['goto'] == 'db_sql.php' && strlen($GLOBALS['table'])) {
		$GLOBALS['table'] = '';
	}
}

if (! $goto_include) {
	if (! strlen($GLOBALS['table'])) {
		$goto_include = 'db_sql.php';
	} else {
		$goto_include = 'tbl_sql.php';
	}
}

// Defines the url to return in case of failure of the query
if (isset($_REQUEST['err_url'])) {
	$err_url = $_REQUEST['err_url'];
} else {
	$err_url = 'tbl_change.php' . PMA_generate_common_url($url_params);
}

/**
 * Prepares the update/insert of a row
 */
if (isset($_REQUEST['primary_key'])) {
	// we were editing something => use primary key
	$loop_array = (is_array($_REQUEST['primary_key']) ? $_REQUEST['primary_key'] : array($_REQUEST['primary_key']));
	$using_key  = true;
	$is_insert  = ($_REQUEST['submit_type'] == $GLOBALS['strInsertAsNewRow']);
} else {
	// new row => use indexes
	$loop_array = array();
	foreach ($_REQUEST['fields']['multi_edit'] as $key => $dummy) {
		$loop_array[] = $key;
	}
	$using_key  = false;
	$is_insert  = true;
}

$query = array();
$message = '';
$value_sets = array();
$func_no_param = array(
	'NOW',
	'CURDATE',
	'CURTIME',
	'UTC_DATE',
	'UTC_TIME',
	'UTC_TIMESTAMP',
	'UNIX_TIMESTAMP',
	'RAND',
	'USER',
	'LAST_INSERT_ID',
);

foreach ($loop_array as $rowcount => $primary_key) {
	// skip fields to be ignored
	if (! $using_key && isset($_REQUEST['insert_ignore_' . $primary_key])) {
		continue;
	}

	// Defines the SET part of the sql query
	$query_values = array();

	// Map multi-edit keys to single-level arrays, dependent on how we got the fields
	$me_fields =
		isset($_REQUEST['fields']['multi_edit'][$rowcount])
		? $_REQUEST['fields']['multi_edit'][$rowcount]
		: array();
	$me_fields_prev =
		isset($_REQUEST['fields_prev']['multi_edit'][$rowcount])
		? $_REQUEST['fields_prev']['multi_edit'][$rowcount]
		: null;
	$me_funcs =
		isset($_REQUEST['funcs']['multi_edit'][$rowcount])
		? $_REQUEST['funcs']['multi_edit'][$rowcount]
		: null;
	$me_fields_type =
		isset($_REQUEST['fields_type']['multi_edit'][$rowcount])
		? $_REQUEST['fields_type']['multi_edit'][$rowcount]
		: null;
	$me_fields_null =
		isset($_REQUEST['fields_null']['multi_edit'][$rowcount])
		? $_REQUEST['fields_null']['multi_edit'][$rowcount]
		: null;
	$me_fields_null_prev =
		isset($_REQUEST['fields_null_prev']['multi_edit'][$rowcount])
		? $_REQUEST['fields_null_prev']['multi_edit'][$rowcount]
		: null;
	$me_auto_increment =
		isset($_REQUEST['auto_increment']['multi_edit'][$rowcount])
		? $_REQUEST['auto_increment']['multi_edit'][$rowcount]
		: null;

	foreach ($me_fields as $key => $val) {

		require './libraries/tbl_replace_fields.inc.php';

		if (empty($me_funcs[$key])) {
			$cur_value = $val;
		} elseif ('UNIX_TIMESTAMP' === $me_funcs[$key] && $val != "''") {
			$cur_value = $me_funcs[$key] . '(' . $val . ')';
		} elseif (in_array($me_funcs[$key], $func_no_param)) {
			$cur_value = $me_funcs[$key] . '()';
		} else {
			$cur_value = $me_funcs[$key] . '(' . $val . ')';
		}

		//  i n s e r t
		if ($is_insert) {
			// no need to add column into the valuelist
			if (strlen($cur_value)) {
				$query_values[] = $cur_value;
				// first inserted row so prepare the list of fields
				if (empty($value_sets)) {
					$query_fields[] = PMA_backquote($key);
				}
			}

		//  u p d a t e
		} elseif (!empty($me_fields_null_prev[$key])
		 && !isset($me_fields_null[$key])) {
			// field had the null checkbox before the update
			// field no longer has the null checkbox
			$query_values[] = PMA_backquote($key) . ' = ' . $cur_value;
		} elseif (empty($me_funcs[$key])
		 && isset($me_fields_prev[$key])
		 && ("'" . PMA_sqlAddslashes($me_fields_prev[$key]) . "'" == $val)) {
			// No change for this column and no MySQL function is used -> next column
			continue;
		} elseif (! empty($val)) {
			// avoid setting a field to NULL when it's already NULL
			// (field had the null checkbox before the update
			//  field still has the null checkbox)
			if (!(! empty($me_fields_null_prev[$key])
			 && isset($me_fields_null[$key]))) {
				$query_values[] = PMA_backquote($key) . ' = ' . $cur_value;
			}
		}
	} // end foreach ($me_fields as $key => $val)

	if (count($query_values) > 0) {
		if ($is_insert) {
			$value_sets[] = implode(', ', $query_values);
		} else {
			// build update query
			$query[] = 'UPDATE ' . PMA_backquote($GLOBALS['db']) . '.' . PMA_backquote($GLOBALS['table'])
					. ' SET ' . implode(', ', $query_values) . ' WHERE ' . $primary_key . ' LIMIT 1';

		}
	}
} // end foreach ($loop_array as $primary_key)
unset($me_fields_prev, $me_funcs, $me_fields_type, $me_fields_null, $me_fields_null_prev,
	$me_auto_increment, $cur_value, $key, $val, $loop_array, $primary_key, $using_key,
	$func_no_param);


// Builds the sql query
if ($is_insert && count($value_sets) > 0) {
	$query[] = 'INSERT INTO ' . PMA_backquote($GLOBALS['db']) . '.' . PMA_backquote($GLOBALS['table'])
		. ' (' . implode(', ', $query_fields) . ') VALUES (' . implode('), (', $value_sets) . ')';

	unset($query_fields, $value_sets);

	$message .= $GLOBALS['strInsertedRows'] . '&nbsp;';
} elseif (! empty($query)) {
	$message .= $GLOBALS['strAffectedRows'] . '&nbsp;';
} else {
	// No change -> move back to the calling script
	$message .= $GLOBALS['strNoModification'];
	$js_to_run = 'functions.js';
	$active_page = $goto_include;
	require_once './libraries/header.inc.php';
	require './' . PMA_securePath($goto_include);
	exit;
}
unset($me_fields, $is_insert);

/**
 * Executes the sql query and get the result, then move back to the calling
 * page
 */
if (! empty($GLOBALS['sql_query'])) {
	$url_params['sql_query'] = $GLOBALS['sql_query'];
	$return_to_sql_query = $GLOBALS['sql_query'];
}
$GLOBALS['sql_query'] = implode('; ', $query) . ';';
$total_affected_rows = 0;
$last_message = '';
$warning_message = '';

foreach ($query as $single_query) {
	if ($GLOBALS['cfg']['IgnoreMultiSubmitErrors']) {
		$result = PMA_DBI_try_query($single_query);
	} else {
		$result = PMA_DBI_query($single_query);
	}
	
	if (! $result) {
		$message .= PMA_DBI_getError();
	} else {
		if (@PMA_DBI_affected_rows()) {
			$total_affected_rows += @PMA_DBI_affected_rows();
		}

		$insert_id = PMA_DBI_insert_id();
		if ($insert_id != 0) {
			// insert_id is id of FIRST record inserted in one insert, so if we
			// inserted multiple rows, we had to increment this

			if ($total_affected_rows > 0) {
				$insert_id = $insert_id + $total_affected_rows - 1;
			}
			$last_message .= '[br]' . $GLOBALS['strInsertedRowId'] . '&nbsp;' . $insert_id;
		}
		PMA_DBI_free_result($result);
	} // end if

	foreach (PMA_DBI_get_warnings() as $warning) {
		$warning_message .= $warning['Level'] . ': #' . $warning['Code'] 
			. ' ' . $warning['Message'] . '[br]';
	}
	
	unset($result);
}
unset($single_query, $query);

$message .= $total_affected_rows . $last_message;

if (! empty($warning_message)) {
	/**
	 * @todo use a <div class="warning"> in PMA_showMessage() for this part of
	 * the message
	 */
	$message .= '[br]' . $warning_message;
}
unset($warning_message, $total_affected_rows, $last_message);

if (isset($return_to_sql_query)) {
	$disp_query = $GLOBALS['sql_query'];
	$disp_message = $message;
	unset($message);
	$GLOBALS['sql_query'] = $return_to_sql_query;
}

// if user asked to "Insert another new row", we need tbl_change.js
// otherwise the calendar icon does not work
if ($goto_include == 'tbl_change.php') {
	/**
	 * @todo if we really need to run many different js at header time,
	 * $js_to_run would become an array and header.inc.php would iterate
	 * thru it, instead of the bunch of if/elseif it does now
	 */
	$js_to_run = 'tbl_change.js';
} else {
	$js_to_run = 'functions.js';
}
$active_page = $goto_include;
require_once './libraries/header.inc.php';
require './' . PMA_securePath($goto_include);
exit;
?>
